using System;
using System.Collections.Generic;
using System.Linq;

namespace Unosquare.Swan.Exceptions {
  /// <summary>
  /// Generic Constraint Registration Exception.
  /// </summary>
  /// <seealso cref="Exception" />
  public class DependencyContainerRegistrationException : Exception {
    private const String ConvertErrorText = "Cannot convert current registration of {0} to {1}";
    private const String RegisterErrorText =
        "Cannot register type {0} - abstract classes or interfaces are not valid implementation types for {1}.";
    private const String ErrorText = "Duplicate implementation of type {0} found ({1}).";

    /// <summary>
    /// Initializes a new instance of the <see cref="DependencyContainerRegistrationException"/> class.
    /// </summary>
    /// <param name="registerType">Type of the register.</param>
    /// <param name="types">The types.</param>
    public DependencyContainerRegistrationException(Type registerType, IEnumerable<Type> types)
        : base(String.Format(ErrorText, registerType, GetTypesString(types))) {
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="DependencyContainerRegistrationException" /> class.
    /// </summary>
    /// <param name="type">The type.</param>
    /// <param name="method">The method.</param>
    /// <param name="isTypeFactory">if set to <c>true</c> [is type factory].</param>
    public DependencyContainerRegistrationException(Type type, String method, Boolean isTypeFactory = false)
        : base(isTypeFactory
            ? String.Format(RegisterErrorText, type.FullName, method)
            : String.Format(ConvertErrorText, type.FullName, method)) {
    }

    private static String GetTypesString(IEnumerable<Type> types) => String.Join(",", types.Select(type => type.FullName));
  }
}